Ac Voltage Measurements; Dc Current Measurements; Resistance Measurements; Diode Measurements - Velleman DVM830L Manual Del Usuario

3.2. AC Voltage Measurements

1) Connect the red test lead to the "VΩmA" jack and the black lead to the "COM"
jack.
2) Place the RANGE switch in the appropriate VAC position.
3) Connect the test leads to the device or circuit to be tested.
4) The voltage value will appear on the display.

3.3. DC Current Measurements

1) Connect the red test lead to the "VΩmA" jack and the black lead to the "COM"
jack. (Connect the red test lead to the "10A"-jack for measurements between
200mA and 10A).
2) Place the RANGE switch in the appropriate ADC position.
3) Open the circuit to be measured and connect the test leads IN SERIES with
the load of which the current is to be measured.
4) Read the current value on the display.

3.4. Resistance Measurements

1) Connect the red test lead to the "VΩmA" jack and the black lead to the "COM"
jack.
2) Place the RANGE switch in the appropriate Ω position.
3) If the resistance being measured is connected to a circuit: disconnect the
power and discharge all capacitors prior to measurement.
4) Connect the test leads to the circuit to be measured.
5) Read the resistance value on the display.

3.5. Diode Measurements

1) Connect the red test lead to the "VΩmA" jack and the black lead to the "COM"
jack.
2) Set the RANGE switch to the
3) Connect the red test lead to the anode and the black test lead to the cathode
of the diode to be measured.
4) The forward voltage drop will be displayed in mV. "1" will be displayed if the
polarity of the diode is reversed.
3.6. Transistor hFE Measurements
1) Connect the black test lead (-) to the "COM" jack and the red test lead (+) to
the "mA" jack.
2) Select the hFE-range with the Range switch.
3) Determine whether the transistor is of the NPN- or PNP-type and locate the
emitter, the base and the collector. Insert the leads into the proper holes in
the included transistor socket.
4) Connect the black test lead (-) to the "COM" terminal and the red test lead
(+) to the other terminal of the transistor socket.
5) The display will show the approximate hFE-value at the moment of testing.
Base current 10µA, Vce 2.8V.
05.05.2010
DVM830L
position.
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